Sonogram obtained before second-trimester amnioinfusion. This fetus has bilaterally absent kidneys consistent with a diagnosis of Potter syndrome. The cystic structures in the renal fossae are most likely the adrenal glands.

Craig B Langman, MD The Isaac A Abt, MD, Professor of Kidney Diseases, Northwestern University, The Feinberg School of Medicine; Division Head of Kidney Diseases, The Ann and Robert H Lurie Children's Hospital of Chicago